Bug 2139280 (CVE-2022-31630) - CVE-2022-31630 php: OOB read due to insufficient input validation in imageloadfont()
Summary: CVE-2022-31630 php: OOB read due to insufficient input validation in imageloa...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-31630
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2139281 2139285 2139286 2139287 2139288 2161668 2161669
Blocks: 2138925
TreeView+ depends on / blocked
 
Reported: 2022-11-02 04:51 UTC by TEJ RATHI
Modified: 2023-05-17 01:46 UTC (History)
4 users (show)

Fixed In Version: php 7.4.33
Clone Of:
Environment:
Last Closed: 2023-05-17 01:46:05 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:0848 0 None None None 2023-02-21 09:31:12 UTC
Red Hat Product Errata RHSA-2023:0965 0 None None None 2023-02-28 08:20:42 UTC
Red Hat Product Errata RHSA-2023:2417 0 None None None 2023-05-09 07:45:36 UTC
Red Hat Product Errata RHSA-2023:2903 0 None None None 2023-05-16 08:26:30 UTC

Description TEJ RATHI 2022-11-02 04:51:58 UTC 
It is possible to construct font files supposed to be loaded by imageloadfont() which trigger OOB reads if the fonts are actually accessed (e.g. by imagechar()).  The given test scripts exploits that by triggering the assignment of a zero byte memory allocation to gdFont.data (which is happily accepted by imageloadfont()), and to read beyond this "buffer" when calling imagechar(). So if an application allows to upload arbitrary font files and working with these, it is likely vulnerable.

References:
https://www.php.net/ChangeLog-8.php#8.0.25
https://bugs.php.net/bug.php?id=81739
Comment 1 TEJ RATHI 2022-11-02 04:52:11 UTC 
Created php tracking bugs for this issue:

Affects: fedora-all [bug 2139281]
Comment 4 errata-xmlrpc 2023-02-21 09:31:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0848 https://access.redhat.com/errata/RHSA-2023:0848
Comment 5 errata-xmlrpc 2023-02-28 08:20:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0965 https://access.redhat.com/errata/RHSA-2023:0965
Comment 6 errata-xmlrpc 2023-05-09 07:45:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2417 https://access.redhat.com/errata/RHSA-2023:2417
Comment 7 errata-xmlrpc 2023-05-16 08:26:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2903 https://access.redhat.com/errata/RHSA-2023:2903
Comment 8 Product Security DevOps Team 2023-05-17 01:46:02 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-31630
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